Results 71 to 80 of about 12,141,047 (255)

Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication

Advanced Materials Technologies, EarlyView.
The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting, Yuh‐Chyi Chang, Yi‐Chan Hung, Cheng‐Yuan Hsiao, Chao‐Kai Wen, Tsung‐Hsien Lin   +5 more
wiley   +1 more source

Region‐Specific Profiling of the Gut Microbiome and Metabolite Landscape in Response to Dietary Intervention Using Electronics‐Free Ingestible Smart Sampling Capsules

Advanced Materials Technologies, EarlyView.
Region‐specific profiling of the gut microbiome is achieved non‐invasively using electronics‐free ingestible sampling capsules that activate at defined intestinal sites through stimuli‐responsive coatings. Deployed in a porcine dietary intervention model, the capsules resolve spatially distinct, fiber‐driven shifts in microbial composition and short ...
Devendra Sarnaik, Caitlyn Sullivan, Akshay Krishnakumar, Fangxin Chen, Anna Clapp Organski, Wayne W. Campbell, Jay S. Johnson, Tzu‐Wen L. Cross, Rahim Rahimi   +8 more
wiley   +1 more source

Fault-tolerant $H^\infty$ control for optical parametric oscillators with pumping fluctuations

, 2022
Optical Parametric Oscillators (OPOs) have wide applications in quantum optics for generating squeezed states and developing advanced technologies. When the phase or/and the amplitude of the pumping field for an OPO have fluctuations due to fault signals,
Yonezawa, Hidehiro, Petersen, Ian R, Dong, Daoyi, Liu, Yanan, Petersen, Ian R., Yonezaw, Hidehiro, Hidehiro Yonezawa, Ian R. Petersen, Yanan Liu, Daoyi Dong   +9 more
core   +1 more source

3D‐Printed Actuator Powered by Liquid Crystal Elastomer Muscles at the Water–Air Interface

Advanced Materials Technologies, EarlyView.
Soft robots for unstructured environments require responsive, durable actuators. Liquid crystal elastomers (LCEs) provide large reversible deformations under thermal or optical stimuli. Direct ink writing enables fabrication of LCE actuators integrated with silicone, with mesogen chemistry and oligomers optimized for printable inks.
Cecilie Ryberg, Stefan Pendlmayr, Jan Skov Pedersen, Jens Vinge Nygaard, Jan P. F. Lagerwall, Brigitte Städler   +5 more
wiley   +1 more source

Alarm‐Based Hybrid Fault‐Tolerant Control Approach for Uncertain Markovian Jump System With Actuator Constraints and Suddenly Occurring Structural Failures

Engineering Reports
This paper addresses the issue of alarm‐based hybrid fault‐tolerant control for Markovian jump systems with uncertainty, in which there may exist actuator and structural failures.
Yufei Xu, Huiyu Li, Yu Chen
doaj   +1 more source

Design of passive fault tolerant control of a process system

, 2015
International audienceFault tolerant control strategies are classified into active tolerant control and passive tolerant control. When an efficient fault diagnosis procedure is difficult to be obtained, a passive tolerant control strategy is a realistic ...
Dahhou, Boutaib, Li, Qiao, Mei Zhang, Qiao Li, Li, Zetao, Zhang, Mei, Zetao Li, Boutaieb Dahhou   +7 more
core   +1 more source

Low‐Outgassing Liquid Metal–Silicone Composites for Multifunctional Space Applications

Advanced Materials Technologies, EarlyView.
Integrating liquid metal microdroplets into a space‐grade silicone creates a multifunctional composite while preserving its inherent flexibility and low‐outgassing behavior. The composite has 11×$\times$ higher thermal conductivity while remaining thermally stable and maintaining a total mass loss of ≤$\le$ 1% under thermal vacuum testing.
Spencer Pak, Matthew R. Jamison, Cadré J. Francis, Ravi Tutika, Stephen A. Morin, Eric J. Markvicka   +5 more
wiley   +1 more source

Fault Diagnosis and Fault Tolerant Control Methods for Manned and Unmanned Helicopters: A Literature Review

, 2013
With the development of unmanned helicopters, the dependability of helicopters have attracted more and more attention of many researchers. In order to deal with these problems, fault diagnosis and fault tolerant control methods were used for manned or ...
Qi JT(齐俊桐), Didier Theilliol, Xia Y(夏泳), Qi X(齐欣), Zhang YM(张友民), Song DL(宋大雷), Wang L(王玲), Han JD(韩建达)   +7 more
core  

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

A passive fault-tolerant control strategy for a non-linear system: An application to the two tank conical non-interacting level control system

Maskay, 2019
In practical engineering systems, unknown actuator, sensor or system component faults frequently occur, which results from component and interconnection failures, degrade control performance, system stability, and profitability, and even arise hazardous ...
Himanshukumar R. Patel, Vipul A. Shah
doaj   +1 more source